Modification of the method for recovering iron and steel from waste enameled articles.



AIDE BAU'K.

MODIFICATION OF THE METHOD FOR REGOVBRING IRON AND STEEL FROM WASTE ENAMELED ARTICLES.

APPLIGATION FILED MAY 9, 1913.

1,126,621 Patented Jan. 26, 1915.

2 SHEETS-SHEET 1.

a A. DHVBAGK. MODIFICATION OF THE METHOD FOR RECOVERING IRON AND STEEL FROM WASTE ENAMELED ARTICLES.

APPLICATION FILED MAY 9, 1913.

1,126,621,, Patented Jan. 26, 1915.

' I 2 SHEETS-SHEET 2.

ll l Wit/mass Y Immim; v

UNITED STATES PATENT OFFICE.

ALFRED DE BACK, OF ESSEN-ON-THE-RUI-IR, GERMANY, ASSIGNOR TO GOLDSCHMIDT DETINNING COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW JERSEY.

MODIFICATION OF THE METHOD FOR RECOVERING IRON AND STEEL FROM WASTE ENAMELED ARTICLES.

To all whom it may concern:

Be it known that I, ALFRED on BACK, subj ect of the King'of Hungary, and resident of Essen-on-the-Ruhr, in the Province of the Rhine, German Empire, have invented certain new and useful Improvements in a Modification of the Method for Recovering Iron and Steel from aste Enameled Articles, of which the following is a specification. 1

In the specification for the U. S. application Serial No. 591982 filed on the 12th November 1912 there is described a. method of recovering iron and steel from waste enameled articles by means of a machine which presses the articles in a series of rollers to break the enamel, and then after having cut the articles into strips, pushes thesestrips against suitably shaped scrapers for the purpose of distorting the strips, thereby opening them and allowing the enamel crushed up by the series of rollers to fall away from between the strips of sheet metal.

I have now found when using the method for removing the enamel described in the specification of the U. S. application Serial Number 591982 that the breaking off of the enamel can be very advantageously effected by arranging the series of rollers in such relation to each other that each successive pair of the rollers has a larger average circumferential speed at the point of contact than the preceding pair of rollers.

My invention therefore consists in treating enameled articles in such manner that the articles are first flattened and their enamel broken by being pressed between series of rollers revolving in opposite directions to each other, which series of rollers are so arranged that the average circumferential speed at the point of contact of each successive pair of rollers is larger than that of the preceding pair, the articles are then cut into strips and these strips may be pushed against suitably shaped scrapers as described in the specification for the U. S. application Serial Number 591982., in order to open the strips and allow the enamel to fall away from between the strips of the sheet metal.

It will be understood that, if the periphery, e. the circumferential line, of each pair of rollers through which the material treat ed has to pass, is increased for each follow- Specifieation of Letters Patent.

Patented Jan. 26, 1915.

Application filed May 9, 1913 Serial No. 766,606.

ing pair of the series and provided that the angular velocity of the rollers remains the same for the following pair of rollers, then the average circumferential speed at the point of contact of each following pair of rollers will be greater than that of the preceding pair, and therefore the corrugations in the material formed by the first pair of rollers will be stretched through the increased speed of the second pair of rollers and after being stretched will be slowly pulled through the first pair of rollers at the speed which will be equal to the difference in the length of the circumferential line of the two pairs of rollers. This action will bend backward and forward all parts of the material and the brittle enamel coating will be broken off. i This process will be repeated at each following pair of rollers. The use of more than two pairs of rollers is only provided to insure a thorough deenameling.

The action which underlies this invention is perhaps better explained by forcibly'pullin a strip of enameled material through three rollers the circumferences of which overlap each other.

According to the one form of apparatus for carrying out my invention I arrange a series of two or more pairs of rollers in such way that the actual circumference or perimeter of the rollers of each successive pair is made larger than the circumference of the preceding one. I do this by altering the shape of the surface of the rollers, by providing projections which vary in number, in pitch, or in depth.

In the accompanying drawings a machine used according to my intention is shown by way of example. A series of five pairs of rollers is shown in the drawings; the number however, can beless, but not less than two.

Figure 1 shows a side elevation and Fig. 2 a plan view.

In Fig. l a and b, 0 and d, c and f, g and h, i and j represent each a pair of rollers of the series. The perimeter or length of contour line of. the rollers of each pair is different from that of the rollers of the adjacent pair, but is so shaped that each roller works in pitch with its corresponding roller, that is to say, with the other roller of the pair. The two rollers of each pair of the series of rollers revolve in opposite directions on suitable spindles. In the example shown the surface line of the rollers is so chosen than the circumference of each roller of the pair a b is about 20 inches, the circumference of 0 d is 22 inches, of e 24 inches, of g h 26 and of z j 28 inches. f course, any suitable variation of the circumference may be made.

In the arrangement shown the series of rollers are vertically superimposed upon each other, but it is' understood that the series of rollers may be arranged in other ways.

The articles to be treated are brought between-two rollers a, b where they are preliminarily flattened. From here they pass through successive rollers c, d, e, f, and so on, until they impinge on the plain, fluted or toothed peripheries of steel disks or cutters 70, Z arranged and fixed on parallel spindles s, s and revolving in opposite directions to each other so that one such disk or cutter on one spindle is made to revolve between two similar disks or cutters on the other spindle. The enameled articles are cut by the rollers 76, Z into strips.

In connection with the arrangement described above scrapers are used as described in the specification for the U. S. application Serial Number 591982, according to which after the enamel has been broken and the articles cut into strips, these strips are pushed against suitably shaped scrapers, so as to. distort and suificiently open them to enable the enamel to fall away.

In the accompanying drawing the arrangement described in the specification for the U. S. application Serial Number 591982 I is shown at the lower end of the series of rollers. The scrapers m, m are mounted on pivots n and are held against the shafts s,.s'

- which are of relatively large diameter.

While the particular apparatus shown I and described is simple and efficient to' effect the successively increasing peripheral speeds of the successive pairs of rollers, it is to be noted that the invention is not l limited to such mechanism, as other ob- 1. A method of recovering iron and steel from waste enameled articles, consisting in passing the articles through two or more pairs of rollers so designed that the average circumferential speed of each pair of rollers at the pass is greater than the average circumferential speed at the pass of the rollers of the preceding pair.

'2. A method of recovering iron and steel from waste enameled articles, consisting in first pressing the articles to flatten the same,

and then passing the flattened articles through twoor more pairs of rollers so designed that. the average circumferential 'speed of each pair of rollers at the pass through two or more pairs of rollers, the

surfaces of the rollers being so shaped that each pair of rollers has a greater average circumferential speed at their pass than the average circumferential speed at the pass of the preceding pair.

4. A method of recovering iron and steel from waste enameled articles, which consists in first pressing the articles together and breaking the enamel by passing them through two or more pairs of rollers, the surfaces of which are shaped in such a way that the different pairs of rollers are provided with projections varying in number, in pitch and in depth, in such a manner that ach 7 pair of rollers has a greater average circumferential speed at their pass than the preceding pair.

5. The method of recovering iron and steel from waste enameled material consisting in compressing the material, bending the same, and then exerting tension on the -bent material, for the purpose described.

6. The methodof recovering iron and steel from waste enameled material, consisting in successively bending the same and placing the bent material under tension after each bending operation, for the purpose described.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses.

ALFRED on BACK. [1,. 5.]

Witnesses:

Hnmlv Norma, ALBERT NW. 

